Bestwall Gypsum Company FOB Grand Rapida DATB August 29, 1956 FROM Paoli Laboratory OFFICB ATTENTION OF Mr* E.

PLAINTIFF'S EXHIBIT Ardaore Hr* J.I.

536 CHAPTER 24 . 1950 Guide Stoker-Fired..

540 CHAPTER 24 7 :1950 Guide vent is not required if the main is above the heater and air can be eliminated through the piping system

704 CHAPTER 33 1950 Guide and for nuisance abatement.

902 CHAPTER 43 1950 Guide oC0O0 . 550 580 1020 910 950 720 750 1170 1210 1530 1300 1400 M odern A ir Conditioning, Heating and V entilating,.by W .

924 CHAPTER 45 1950 Guide Design Based on Total Air Flow ' Where the foregoing factors are not known, the usual method of de signing an exhaust system is to base the air flow through the system oh rates of flow (through each hood) which have been found by experience to provide adequate control.

HEATING VENTILATING AIR CONDITIONING GUIDE 1951 An Instrument of Service Prepared for the Profession containing A TECHNICAL DATA SECTION OP REFERENCE MATpRTAT..

24 CHAPTER 3 1951 Guide velocity, and energy in the form of enthalpy.

64 CHAPTER 3 1951- Guide 20.270 - A, = 0003164 - W, 1 k, - 0.668 " W, - 0.000630 " 4 from which A, = 16.350 and IF, = 0.002657.

420 CHAPTER 17 1951 Guide Table 1.

426 CHAPTER 17 1951 Guide' Solution.

430 CHAPTER 18 1951 Guide/ in balancing the air distribution of the system, a damper should be placed in each leader pipe except one, this latter leader preferably being connected to a room heated at all times, such as a living room.

526 CHAPTER 22 1951 Guide For a radiator, the finish coat of paint affects the heat output.

642 CHAPTER 30 1951 Guide prevent the primary or induced air stream from striking furniture and obstacles, and producing objectionable drafts.